Le Tour's are great conversion canidates, with one small problem(but its a problem on just about every conversion). You either have to get a new long reach brake and have a full set of 700c wheels, or find/ build a 27" fixed rear. If you go with the 27" you will only need a rear wheel, but it will usually be more expensive, and you wont be able to get as high quality of tires for the most part. If you go with 700, you will have to buy two wheels, but individually they will be cheaper, have more choice, and a wider tire selection. You would also have to buy a new brake.